go-json/internal/encoder/compiler_norace.go

64 lines
2.0 KiB
Go

//go:build !race
// +build !race
package encoder
import (
"unsafe"
"github.com/goccy/go-json/internal/runtime"
)
func CompileToGetCodeSet(typeptr uintptr) (*OpcodeSet, error) {
if typeptr > typeAddr.MaxTypeAddr {
return compileToGetCodeSetSlowPath(typeptr)
}
index := (typeptr - typeAddr.BaseTypeAddr) >> typeAddr.AddrShift
if codeSet := cachedOpcodeSets[index]; codeSet != nil {
return codeSet, nil
}
// noescape trick for header.typ ( reflect.*rtype )
copiedType := *(**runtime.Type)(unsafe.Pointer(&typeptr))
noescapeKeyCode, err := compileHead(&compileContext{
typ: copiedType,
structTypeToCompiledCode: map[uintptr]*CompiledCode{},
structTypeToCode: map[uintptr]*StructCode{},
structTypeToCodes: map[uintptr]Opcodes{},
recursiveCodes: &Opcodes{},
})
if err != nil {
return nil, err
}
escapeKeyCode, err := compileHead(&compileContext{
typ: copiedType,
structTypeToCompiledCode: map[uintptr]*CompiledCode{},
structTypeToCode: map[uintptr]*StructCode{},
structTypeToCodes: map[uintptr]Opcodes{},
recursiveCodes: &Opcodes{},
escapeKey: true,
})
if err != nil {
return nil, err
}
noescapeKeyCode = copyOpcode(noescapeKeyCode)
escapeKeyCode = copyOpcode(escapeKeyCode)
setTotalLengthToInterfaceOp(noescapeKeyCode)
setTotalLengthToInterfaceOp(escapeKeyCode)
interfaceNoescapeKeyCode := copyToInterfaceOpcode(noescapeKeyCode)
interfaceEscapeKeyCode := copyToInterfaceOpcode(escapeKeyCode)
codeLength := noescapeKeyCode.TotalLength()
codeSet := &OpcodeSet{
Type: copiedType,
NoescapeKeyCode: noescapeKeyCode,
EscapeKeyCode: escapeKeyCode,
InterfaceNoescapeKeyCode: interfaceNoescapeKeyCode,
InterfaceEscapeKeyCode: interfaceEscapeKeyCode,
CodeLength: codeLength,
EndCode: ToEndCode(interfaceNoescapeKeyCode),
}
cachedOpcodeSets[index] = codeSet
return codeSet, nil
}